Stretch goals are best defined as:

Multiple Choice

• the goals that are high enough to inspire better performance but at the same time are always unattainable.
• the goals that conflict with people's personal values and interests.
• the targets that merely exhort employees in general terms to improve performance and start doing their best.
• the set of goals whose primary focus is to protect organizations from being sustainable.
• the targets that are exceptionally demanding and novel.